Yes It connected with wifi module.I connect for only show how is experience of internet in this device.

Up to 32 GB can work.

Cut the USB cable of your old android mobile charger.

You can use any powerbank . You can connect directly powerbank to raspberry pi via android data cable.You can use any plastic box .You can buy this from Stationary shop,Plastic box shop.You can buy online https://www.amazon.com/dp/B079HQKG24/ref=sspa_mw_detail_5?psc=1